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Fraser
2012-Jul-09, 10:40 PM
Caption: Swirling Aurora. Image Credit: Jason Ahrns There have been legends and folktales about sounds associated with auroae, but most accounts were summarily dismissed as imagination or illusion. But researchers in Finland set up microphones in conjunction with an aurora observation site and over the past 12 years captured a “clapping” sound that occurs at [...]

More... (http://www.universetoday.com/96193/mysterious-sounds-made-by-the-aurora-borealis/)

publiusr
2012-Jul-09, 11:09 PM
I would have thought it a hissing sound.